Middle Atlantic 1124L-1 Locking Nipple 1-Inch IPS
Overview
The Middle Atlantic 1124L-1 is a 1-inch IPS locking nipple designed for in-floor service fitting installations. At 25.4 mm nominal diameter, it provides the threaded coupling point between conduit runs and floor service fittings — the mechanical interface that keeps a floor box or raceway assembly locked in position rather than rotating or backing out under repeated use. TAA-compliant construction makes it eligible for federal, state, and local government projects subject to the Trade Agreements Act.
Compatibility
The 1124L-1 is part of Middle Atlantic's 1124L-525 series locking nipple line for in-floor raceway systems. It is sized for standard 1-inch IPS (Iron Pipe Size) threaded fittings used across Middle Atlantic in-floor service fitting assemblies. Verify the thread standard and diameter against your specific floor box or service fitting model before ordering — IPS and NPT share the same thread pitch at 1 inch (11.5 TPI) and are generally interchangeable, but confirm fitment with your floor system documentation. Not intended for liquid or pressure applications.
Installation Notes
Thread engagement should follow standard IPS practice: hand-tighten fully, then advance with a wrench to achieve a secure, non-rotating fit. The locking feature prevents back-out once seated, so confirm final positioning before completing the assembly — repositioning after locking may require additional effort. No special tooling beyond a standard pipe wrench or adjustable wrench is required. Compatible with standard structured cabling floor service rough-in workflows.
